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Posted to derby-dev@db.apache.org by "Dag H. Wanvik (JIRA)" <ji...@apache.org> on 2014/08/06 19:30:11 UTC
[jira] [Assigned] (DERBY-6688) NPE (or sane: ASSERT failure) with
ROW_NUMBER in some subqueries
[ https://issues.apache.org/jira/browse/DERBY-6688?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dag H. Wanvik reassigned DERBY-6688:
------------------------------------
Assignee: Dag H. Wanvik
> NPE (or sane: ASSERT failure) with ROW_NUMBER in some subqueries
> ----------------------------------------------------------------
>
> Key: DERBY-6688
> URL: https://issues.apache.org/jira/browse/DERBY-6688
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Reporter: Dag H. Wanvik
> Assignee: Dag H. Wanvik
> Attachments: derby-6688-b.diff, derby-6688-b.status, derby-6688.diff
>
>
> This subquery usage works:
> {code}
> select * from (select x from t order by row_number() over () fetch first 1 row only) tt;
> {code}
> but this one leads to NPE in insane mode, or a Sanity ASSERT failure in sane mode:
> {code}
> select * from t where x = (select x from t order by row_number() over () fetch first row only);
> {code}
> leading to this error:
> {code}
> Exception in thread "main" java.sql.SQLException: Java exception: ': java.lang.NullPointerException'.
> at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
> at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
> at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown Source)
> at org.apache.derby.impl.jdbc.Util.javaException(Unknown Source)
> at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown Source)
> at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
> at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> at derby6565.Derby6565.main(Derby6565.java:33)
> Caused by: ERROR XJ001: Java exception: ': java.lang.NullPointerException'.
> at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
> at org.apache.derby.impl.jdbc.SQLExceptionFactory.wrapArgsForTransportAcrossDRDA(Unknown Source)
> ... 11 more
> Caused by: java.lang.NullPointerException
> at org.apache.derby.impl.sql.compile.UnaryOperatorNode.getReceiverInterfaceName(Unknown Source)
> at org.apache.derby.impl.sql.compile.UnaryOperatorNode.generateExpression(Unknown Source)
> at org.apache.derby.impl.sql.compile.ResultColumn.generateExpression(Unknown Source)
> at org.apache.derby.impl.sql.compile.ResultColumnList.generateEvaluatedRow(Unknown Source)
> at org.apache.derby.impl.sql.compile.ResultColumnList.generateCore(Unknown Source)
> at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(Unknown Source)
> at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(Unknown Source)
> at org.apache.derby.impl.sql.compile.OrderByList.generate(Unknown Source)
> at org.apache.derby.impl.sql.compile.OrderByNode.generate(Unknown Source)
> at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(Unknown Source)
> at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(Unknown Source)
> at org.apache.derby.impl.sql.compile.RowCountNode.generate(Unknown Source)
> at org.apache.derby.impl.sql.compile.SubqueryNode.generateExpression(Unknown Source)
> at org.apache.derby.impl.sql.compile.BinaryOperatorNode.generateExpression(Unknown Source)
> at org.apache.derby.impl.sql.compile.ResultColumn.generateExpression(Unknown Source)
> at org.apache.derby.impl.sql.compile.ResultColumnList.generateEvaluatedRow(Unknown Source)
> at org.apache.derby.impl.sql.compile.ResultColumnList.generateCore(Unknown Source)
> at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generateMinion(Unknown Source)
> at org.apache.derby.impl.sql.compile.ProjectRestrictNode.generate(Unknown Source)
> at org.apache.derby.impl.sql.compile.UpdateNode.generate(Unknown Source)
> at org.apache.derby.impl.sql.compile.StatementNode.generate(Unknown Source)
> at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
> at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
> at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)
> ... 3 more
> {code}
> The immediate problem is that the field *#operand* is null.
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